Good hunting gets better with quality optics. That's how Vortex looks at it. And the Diamondback series reflects it, giving you the performance needed to get the trophy even in the worst hunting conditions. Starting with their lenses, Vortex uses quality glass and full multicoatings for a solid 91% light transmission. Precise adjustments are quick and easy on the Diamondback, thanks to pop up dials that adjust in audible 1/4 MOA increments for fast and precise adjustments. And, with the fine machining of the metal on metal dials, accuracy can be counted on for years. This scope's toughness starts with its one-piece aircraft-grade aluminum tube construction.